#include<iostream>
#include<cmath>
#include<string>
using namespace std;
char temp[63];
int k;
void init_temp()
{
	for (int i = 0; i < 10; i++) {
		temp[k++] = (char)(i + '0');
	}
	for (int i = 'A'; i <= 'Z'; i++) {
		temp[k++] = (char)(i);
	}
	for (int i = 'a'; i <= 'z'; i++) {
		temp[k++] = (char)(i);
	}
}
int main()
{
	init_temp();
	for (int i = 0; i < k; i++) {
		cout << temp[i] << " ";
	}
	return 0;
}